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[Launchpad Bug Tracker <1504778@xxxxxxxxxxxxxxxxxx>]

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Can confirm the bug on Lenovo g50-80.

Alsa-hda-dkms package doesn't help (there is no "Inverted Internal Mic"
entry in alsamixer after reboot).

Removed alsa-hda-dkms and tried "option snd-hda-intel model=auto" but it
doesn't help.

Workaround "mute right channel" works but can it be fixed permanently (I
don't want to manually mute right mic channel every time I use skype)?

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-30.34~14.04.1-generic 3.19.8-ckt6
Uname: Linux 3.19.0-30-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.15
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/pcmC1D0p:   nikola     1819 F...m pulseaudio
 /dev/snd/controlC1:  nikola     1819 F.... pulseaudio
 /dev/snd/controlC0:  nikola     1819 F.... pulseaudio
CurrentDesktop: KDE
Date: Sat Oct 10 15:31:56 2015
InstallationDate: Installed on 2015-10-06 (3 days ago)
InstallationMedia: Kubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
SourcePackage: alsa-driver
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/27/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: B0CN72WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Lenovo G50-80
dmi.board.vendor: LENOVO
dmi.board.version: NO DPK
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo G50-80
dmi.modalias: dmi:bvnLENOVO:bvrB0CN72WW:bd01/27/2015:svnLENOVO:pn80L0:pvrLenovoG50-80:rvnLENOVO:rnLenovoG50-80:rvrNODPK:cvnLENOVO:ct10:cvrLenovoG50-80:
dmi.product.name: 80L0
dmi.product.version: Lenovo G50-80
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: David Henningsson (diwic)
         Status: In Progress


** Tags: amd64 apport-bug third-party-packages trusty
-- 
Lenovo G50-80 - Inverted Internal microphone (phase inversion)
https://bugs.launchpad.net/bugs/1504778
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